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Which of the following is/are the characteristics of a metal oxide if the Pilling and Bed worth ratio is less than 1?

Which of the following is/are the characteristics of a metal oxide if the Pilling and Bed worth ratio is less than 1? Correct Answer Unprotective and insufficient oxide

If Pilling and Bed worth ratio of a metal oxide is less than 1 then it is an unprotective and insufficient oxide, if it is near to 1 then it is protective and adherent and if it is greater than 1 then it is unprotective.

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